[1] His appointment was heavily criticized, among others by group of doctors at the Clinical Centre of Serbia, due to the "lack of professional skills", unexplained origin of wealth and criminal connections.

According to the 2004 testimony of the cooperative witness Dejan Milenković Bagzi (who was an important member of the Zemun Clan) in the Zoran Đinđić trial, in Serbian Special Court for Organised Crime: on 5 September 2002, Belgrade-based Rakovica Clan tried to eliminate the Montenegrin criminal Veselin Božović Vesko, but he survived the assassination and was transferred to the Clinical Centre of Serbia in which at that time worked Lončar.

[8] According to Milenković, head of the criminal group Dušan Spasojević who also had interest of Božović's death, asked one of his insider doctors Risović to finish him in the hospital, but he was having second thoughts.

[9] Officially, ten days after Božović's death, Lončar bought the apartment from the wife of Zemun Clan hitman Sretko Kalinić for 30,000 euros only to re-sell it months later.

[10] In January 2017, following the political battle with former ally Prime Minister Aleksandar Vučić and alleged assassination attempt, Serbian politician Velimir Ilić showed media several photos of Lončar and notorious Zemun Clan now deceased head Dušan Spasojević,[11] along with other criminal members and footballers Dragoljub Jeremić and Danko Lazović who were interrogated during the Operation Sabre.

[16] According to one group of doctors at the Clinical Centre of Serbia, Lončar has paid 3,000 euros daily over 60 days for the treatment of newborn daughter in Vienna.